package com.jsf.util;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.hibernate.HibernateException;
import org.hibernate.SessionFactory;

public class OpenSessionInViewFilter implements Filter{

	private SessionFactory sessionFactory;

	@Override
	public void destroy() {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,
			FilterChain filterChain) throws IOException, ServletException {
		
		try{
			this.sessionFactory.getCurrentSession().beginTransaction();
			
			filterChain.doFilter(servletRequest, servletResponse);
			
			this.sessionFactory.getCurrentSession().getTransaction().commit();
			this.sessionFactory.getCurrentSession().close();
			
		}catch(HibernateException he){
			try{
				if(this.sessionFactory.getCurrentSession().getTransaction().isActive()){
					this.sessionFactory.getCurrentSession().getTransaction().rollback();
				}
			}catch(Exception e){
				e.printStackTrace();
			}
			
			throw new ServletException(he);
		}
	}

	@Override
	public void init(FilterConfig conf) throws ServletException {
		this.sessionFactory = HibernateUtil.getSessionFactory();
	}

}
